/*
 * Copyright 2009 The Apache Software Foundation Licensed under the Apache
 * License, Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law
 * or agreed to in writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */

package org.apache.ibatis.ibator.generator.ibatis3.javamapper.elements;

import java.util.List;
import java.util.Set;
import java.util.TreeSet;

import org.apache.ibatis.ibator.api.IntrospectedColumn;
import org.apache.ibatis.ibator.api.dom.java.FullyQualifiedJavaType;
import org.apache.ibatis.ibator.api.dom.java.Interface;
import org.apache.ibatis.ibator.api.dom.java.JavaVisibility;
import org.apache.ibatis.ibator.api.dom.java.Method;
import org.apache.ibatis.ibator.api.dom.java.Parameter;

/**
 * @author Jeff Butler
 */
public class DeleteByPrimaryKeyMethodGenerator extends
		AbstractJavaMapperMethodGenerator
{

	public DeleteByPrimaryKeyMethodGenerator()
	{
		super();
	}

	@Override
	public void addInterfaceElements(Interface interfaze)
	{
		Set<FullyQualifiedJavaType> importedTypes = new TreeSet<FullyQualifiedJavaType>();
		Method method = new Method();
		method.setVisibility(JavaVisibility.PUBLIC);
		method.setReturnType(FullyQualifiedJavaType.getIntInstance());
		method.setName(introspectedTable.getDeleteByPrimaryKeyStatementId());

		if (introspectedTable.getRules().generatePrimaryKeyClass())
		{
			FullyQualifiedJavaType type = new FullyQualifiedJavaType(
					introspectedTable.getPrimaryKeyType());
			importedTypes.add(type);
			method.addParameter(new Parameter(type, "key")); //$NON-NLS-1$
		}
		else
		{
			// no primary key class - fields are in the base class
			// if more than one PK field, then we need to annotate the
			// parameters
			// for iBATIS3
			List<IntrospectedColumn> introspectedColumns = introspectedTable
					.getPrimaryKeyColumns();
			boolean annotate = introspectedColumns.size() > 1;
			if (annotate)
			{
				importedTypes.add(new FullyQualifiedJavaType(
						"org.apache.ibatis.annotations.Param")); //$NON-NLS-1$
			}
			StringBuilder sb = new StringBuilder();
			for (IntrospectedColumn introspectedColumn : introspectedColumns)
			{
				FullyQualifiedJavaType type = introspectedColumn
						.getFullyQualifiedJavaType();
				importedTypes.add(type);
				Parameter parameter = new Parameter(type,
						introspectedColumn.getJavaProperty());
				if (annotate)
				{
					sb.setLength(0);
					sb.append("@Param(\""); //$NON-NLS-1$
					sb.append(introspectedColumn.getJavaProperty());
					sb.append("\")"); //$NON-NLS-1$
					parameter.addAnnotation(sb.toString());
				}
				method.addParameter(parameter);
			}
		}

		ibatorContext.getCommentGenerator().addGeneralMethodComment(method,
				introspectedTable);

		if (ibatorContext.getPlugins().daoDeleteByPrimaryKeyMethodGenerated(
				method, interfaze, introspectedTable))
		{
			interfaze.addImportedTypes(importedTypes);
			interfaze.addMethod(method);
		}
	}

}
